**Core Concept**
Both cerebral abscess and cerebral infarct are types of brain lesions that result from different pathological processes. Cerebral infarction typically occurs due to a reduction in blood flow to the affected area, leading to ischemia and subsequent cell death. In contrast, cerebral abscess is a collection of pus in the brain tissue, usually as a result of bacterial infection.

**Why the Correct Answer is Right**
Liquefactive necrosis is a type of cell death characterized by the breakdown of brain tissue into a liquid or gelatinous mass. This occurs in both cerebral abscesses and cerebral infarcts due to the enzymatic degradation of cellular components and the presence of inflammatory cells. In the case of cerebral infarction, the breakdown of brain tissue is a result of the reperfusion injury following the restoration of blood flow, leading to the activation of various enzymes such as proteases, lipases, and glycolytic enzymes. In cerebral abscesses, the liquefactive necrosis is a result of the bacterial infection and the subsequent inflammatory response, which leads to the activation of similar enzymes.

**Why Each Wrong Option is Incorrect**

**Option A:** Coagulative necrosis is a type of cell death characterized by the preservation of the cell outline and the coagulation of the cytoplasm, which is typically seen in infarcts of the kidney, liver, and heart, but not in the brain.

**Option C:** While some brain lesions can heal through collagen formation, this is not a characteristic feature of either cerebral abscess or cerebral infarct.

**Option D:** Cerebral infarcts do not always develop from emboli from other sites; other causes such as vasculitis, vasospasm, or cardiac conditions can also lead to infarction.

**Clinical Pearl / High-Yield Fact**
It is essential to differentiate between cerebral abscess and cerebral infarct based on clinical presentation, imaging studies, and laboratory findings, as the management of these two conditions differs significantly.

**✓ Correct Answer: B. Liquefactive necrosis**